Practice Page
Directions: Answer these questions pertaining to common factors. The cartoon people may, or may not, be helpful!!

1.
What is the greatest common factor (GCF) of
30 and 45?

Choose:
5
9
15
18
pic1

 

 

2.
What is the greatest common factor (GCF) of 7 and 15?

Choose:
1
3
5
7
pic2

 

 

3.
What is the greatest common factor (GCF) for 9, 21, and 63?

Choose:
3
7
9
12
pic4

 

 

4.
What is the least common multiple (LCM) for 2, 4 and 9?

Choose:
8
18
36
72
pic3

 

 

5.
Two numbers have a greatest common factor of 8, and a least common multiple of 48. If one of the numbers is 16, what is the other number?

Choose:
3
18
24
36
pic5

 

 

6.
What are the common factors of 15 and 45?

Choose:
5, 15 1, 3, 5, 15
3, 5, 15 1, 3, 5, 9, 15
pic7

 

 

7.
Two whole numbers have a least common multiple of 12. Each number is less than or equal to 12. And the greatest common factor of the two numbers is 2. What are the two numbers?
Choose:
4 and 6
6 and 12
8 and 12 2 and 4
pic6

 

 

8.
For which pair of numbers is their least common multiple the same as their product?

Choose:
4 and 8 7 and 11
6 and 9 8 and 10
pic8

 

 

9.
What are the factors of 121?
Choose:
1, 121 1, 3, 121
1, 3, 7, 121 1, 11, 121
pic9

 

 

10.
Which of the following numbers have the same least common multiple as 4 and 5? (Check all that apply, and hit SUBMIT!)
 

10 and 4

2 and 5

10 and 2

20 and 1

5 and 20

        

pic10

 

 

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